"Mast" is the highest pole on the sailboat which holds the sails (I don't know to explain it haha, but you can see it on the photo). Anywaaaay, I was up there! For the third time though, but it was the first time I took photos from there. I didn't climb there or anything, but if you have a strong man with you on the boat, he can lift you up with a rope and a pulley.
The view is spectacular, especially at sunset.